Physica E: Low-dimensional Systems and Nanostructures
Physica E: Low-dimensional Systems and Nanostructures > 2004 > 21 > 2-4 > 304-307
Physica E: Low-dimensional Systems and Nanostructures > 2004 > 23 > 1-2 > 217-220
Physica E: Low-dimensional Systems and Nanostructures > 2004 > 24 > 3-4 > 227-233